Xu Jingqiu, whose husband passed away due to illness, takes her son back to the village to build a poultry breeding station. Unexpectedly, her neighbor Zhao Dewang's fierce dog, Leihu, breaks into the home and bites her child. Zhao Dewang stubbornly denies responsibility, relying on his son's status to bully others. Acting according to regulations, Xu Jingqiu implements experimental carrier pigeons and protective facilities ahead of schedule, and the fierce dog gets trapped in the buffer zone when it breaks into the courtyard again. In the middle of the night, Zhao Dewang climbs over the wall and smashes the steel mesh, causing the experimental carrier pigeons to be destroyed. After gathering evidence from multiple parties and a court trial and judgment, Zhao Dewang bears the liability for infringement compensation. After the storm, the entire village improves the dog management ledger, and Xu Jingqiu also teaches her child that boundaries are not used to bully people, but to remind people to know when to stop.